JIS G3444 Carbon Steel Tubes For General Structural Purposes
JS G3444 steel pipe has good mechanical properties and processing properties, so it is often used in the manufacture of various mechanical parts, such as shafts, bearings, gears.
In the manufacture of heavy machinery equipment, JSG3444 steel pipe is often used as the frame or support structure of the equipment, providing the necessary strength and stiffness.
When you choose Haotan JIS G3444 tubing, you’re investing in quality,efficiency, and a product that stands the test of time.
Specifications
• JIS G3441 tubing come with a comprehensive specification, steel grades from low carbon to alloy steels.
• Procedure: seamless
• Dimensions: O.D.: 10 mm – 120 mm
• Thickness: 1.0mm – 20mm
• Steel Grade: STK 290, STK 400, STK 500, STK 490,STK540
• Surface Coating: Black, Red, Primer, Hot Dip Galvanizing
• End Type: Square cut, Bevelled, Grooved
• Pipe Packing: In bundles, Plastic film full length wrap
Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S |
| STK 290 | － | － | － | ≤0.05 | ≤0.05 |
| STK 400 | ≤0.25 | 0.15～0.35 | － | ≤0.04 | ≤0.04 |
| STK 500 | ≤0.24 | 0.15~0.35 | 0.30~1.30 | ≤0.04 | ≤0.04 |
| STK 490 | ≤0.18 | 0.15～0.35 | ≤1.50 | ≤0.04 | ≤0.04 |
| STK 540 | ≤0.23 | 0.15~0.35 | ≤1.50 | ≤0.04 | ≤0.04 |
Mechanical Property
| Symbol of grade | Elongation value per each range of wall thickness % | |||||||
| Over 7mm to and excl 8 mm | Over 6mm to and incl 7 mm | Over 5mm to and incl 6mm | Over 4 mm to and incl 5 mm | Over 3mm to and incl 4 mm | Over 2 mm to and incl 3 mm | Over 1 mm to and incl 2 mm | 1 mm or under | |
STK290 | 30 | 28 | 27 | 26 | 24 | 22 | 21 | 20 |
| 25 | 24 | 22 | 20 | 19 | 18 | 16 | 14 | |
| STK400 | 23 | 22 | 20 | 18 | 17 | 16 | 14 | 12 |
| 18 | 16 | 15 | 14 | 12 | 10 | 9 | 8 | |
| STK500 | 15 | 14 | 12 | 10 | 9 | 8 | 6 | 4 |
| 10 | 8 | 7 | 6 | 4 | 2 | 1 | 一 | |
STK490 | 23 | 22 | 20 | 18 | 17 | 16 | 14 | 12 |
| 18 | 16 | 15 | 14 | 12 | 10 | 9 | 8 | |
| STK540 | 20 | 18 | 17 | 16 | 14 | 12 | 11 | 10 |
| 16 | 14 | 13 | 12 | 10 | 8 | 7 | 6 | |
Why Choose HAOTAN?
• Founded in 2011, Haotan is a leading force in China’s steel tube manufacturing and export. We promise to give you the best quality at the lowest price. For any inquiries regarding the purchase of steel tubes, feel free to reach out to us.
• Full Range Of Steel Pipes: HAOTAN provides a full range of steel tubes. This includes semaless tube, ERW pipe, steel hollow section, line pipe, coated pipe, honed tube and more.
• Standard Certifications: We hold international certifications, including ISO9001, IATF16949 and many letters patents, the tube products are manufactured following ASTM, DIN, EN, BS,JISG standards.
• Worry-free After-sales Service: We provide professional selling team. It handles returns and exchanges on time if there are quality problems.
Production Process Flow Chart
